Fig. 3

Photomicroscopy of the tongue with congestion. Note the dilated capillaries that are full of plasma and/ or red blood cells (*): a – Slightly dilated capillaries featuring mild tissue congestion (Animal of the SG group after 1 inhalation exposure of 2,4-D). b - Slightly dilated capillaries featuring mild tissue congestion (Animal of the LCG group after 1 inhalation exposure of 2,4-D). c - Very dilated capillaries featuring moderate tissue congestion (Animal of the MCG group after 3 inhalation exposures of 2,4-D). d - Very dilated capillaries featuring moderate tissue congestion (Animal of the HCG group after 2 inhalation exposures of 2,4-D). Hematoxylin-eosin, 100x magnification (100 µm bar for scale)